The transfer window isn't even open yet and there has been speculation linking United with deals for enough players to make up two full teams. At least.

But are any of the names upgrades on what Louis van Gaal already has in his squad? We've taken the players who have been linked most consistently with United this summer and put them head-to-head against the current first team.

It's up to you to decide whether the potential new arrival is an upgrade or not.

Valdes v Lloris

Most United fans would quite like to keep David De Gea, but it looks like he'll end up at Real Madrid, either this summer or next. Hugo Lloris has been the goalkeeper most consistently linked with replacing De Gea. But Van Gaal already has three-time Champions League winner Victor Valdes waiting in the wings.

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Which one would you prefer?

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Valencia v Clyne

It looks like Rafael is on his way out after failing to convince Van Gaal and if the season started tomorrow Antonio Valencia would likely get the nod at right-back. But he's a midfielder and if United have got genuine hopes of winning the Premier League, you would think they'll need a specialist. Nathaniel Clyne has been linked with a move to Old Trafford, but he's also of interest to Liverpool.

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Who do you fancy at right-back?

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Shaw v Coentrao

With Luke Shaw, Marcos Rojo, Daley Blind and Tyler Blackett in the squad, it's unlikely Van Gaal and Ed Woodward are going to waste time and money buying another left-back. But that hasn't stopped reports in Spain linking United with Real Madrid's Fabio Coentrao. He almost signed for United in 2013, but things have moved on a bit since then.

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And left-back?

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Smalling v Hummels

Chris Smalling had become Van Gaal's first-choice centre-back by the end of the season. But that's not going to stop the Dutchman adding another defender this summer. Mats Hummels has been linked with United for more than a year. He remains one of Van Gaal's top defensive targets, but there hasn't been much movement since the end of the season.

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Who are you having at centre-back?

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Rojo v Ramos

Sergio Ramos is the latest name to be added to United's summer wish-list. It's easy to see why Van Gaal would be interested, but Ramos has got form for using other clubs to get a better deal at Real Madrid. Marcos Rojo is slightly ahead of Phil Jones in the pecking order as it stands. Would Ramos be an upgrade on Rojo, who looked comfortable at centre-back last season when he was fit?

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And the other one?

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Carrick v Schweinsteiger

Van Gaal has been open about his pursuit of a right-footed No.6 this summer, and he knows Bastian Schweinsteiger well from their time together at Bayern Munich. Michael Carrick was one of United's best players last season. But Van Gaal has admitted the amount of time he spent out injured is a worry. At 33-years-old he made fewer starts last season than in any of his previous eight seasons at Old Trafford.

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Carrick v Schweinsteiger

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Blind v Schneiderlin

Daley Blind started the season well after his move from Ajax. But as the season wore on he looked short of pace, especially during the FA Cup defeat to Arsenal. Van Gaal, though, sees him as a midfielder - useful because he's left-footed and offers better 'balance'. As the United manager looks to bolster his midfield, there has been speculation linking Southampton's Morgan Schneiderlin. Kevin Strootman is a long-term target but there are doubts about his fitness after knee surgery.

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Blind or Schneiderlin?

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Herrera v Gundogan

Ander Herrera couldn't get in the team at the start of the season. But he ended it as one of Van Gaal's first-choice midfielders, along with Marouane Fellaini. It was reported as early May that United had made an offer for Ilkay Gundogan. But despite speculation in Germany he's set to leave Borussia Dortmund this summer, the talk, which also included links with Bayern Munich and Barcelona, has gone quiet.

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Who's the better bet?

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Mata v De Bruyne

Van Gaal struggled to find a place for Juan Mata in the first half of the season. But playing on the right of a front three, he was key to the run that helped United into the top four, scoring both goals in the 2-1 win over Liverpool at Anfield. Kevin De Bruyne was voted the German PFA's player of the year last season and had more assists last season than anyone in Europe's top five leagues.

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Who gets the nod?

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Di Maria v Bale

Angel Di Maria had a poor first season in England after his move from Real Madrid. But there is still a genuine hope at Old Trafford that he can produce the form he showed at the Bernabeu in the Premier League. United have retained an interest in Gareth Bale since before he left Southampton for Tottenham. His fate this summer will be decided by Real Madrid and whether they are ready to cut him loose. United also have Memphis Depay, Adnan Januzaj and Ashley Young challenging for the wide positions.

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Who are you having on the left?

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Rooney v Kane

When Van Gaal landed on his variation of 4-3-3 in the second half of last season, it was Wayne Rooney, more often than not, who was used as the central striker. The Dutchman has been linked with a number of centre forwards as he looks to replace Radamel Falcao. But is Harry Kane, who only has one full season in the Premier League, an upgrade?